Dr. Clark co-owned and served as medical director of Louisiana Spine & Sports, a Baton Rouge-based pain management clinic. From about June 2005 through March 2015, Dr. Clark, his billing supervisor Ms. Severio, and others participated in a scheme to submit fraudulent claims to Medicare and other insurers indicating that minor surgical procedures happened on days after office visits, when both occurred on the same day, according to plea documents cited by the Justice Department.

Dr. Clark admitted that the practice was intended to defraud healthcare insurers for nonreimbursable office visits. He said he also falsified records substantiating the fraudulent claims and directed Ms. Severio and others to do the same. Ms. Severio admitted to her involvement.